In-Plane Thermoelectric Properties of Flexible and Room-Temperature-Doped Carbon Nanotube Films
In-Plane Thermoelectric Properties of Flexible and Room-Temperature-Doped Carbon Nanotube Films
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DOI：
10.1021/acsaem.0c00995
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发表时间：
2020-07-27
影响因子：
6.4
通讯作者：
Ghosh, Tushar K.
中科院分区：
文献类型：
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作者：
Chatterjee, Kony;Negi, Ankit;Ghosh, Tushar K.
具有高功率因数 (PF) 和低导热率 (kappa) 的软材料对于将热电 (TE) 模块集成到能量收集或冷却应用的灵活外形尺寸中至关重要。在此，报道了具有高PF（高达521 mu W/m K-2）的空气稳定的p型和n型多壁碳纳米管薄膜，并在简便的两步过程中进行了n型掺杂。 p 型和 n 型 CNT 在 300 K 时的最大品质因数 (ZT) 分别为 0.019 和 0.015，所有三种传输特性（塞贝克系数、电导率和 kappa）均在面内测量，提供了更准确的 ZT。使用时域热反射，我们报告了一种快速、非接触式的测量。无需复杂的微加工或材料加工。此外，TE 模块的 p 型腿和 n 型腿之间不存在材料失配。此类材料在廉价且可扩展的可穿戴能量收集和局部加热/冷却方面具有广泛应用的潜力。
Soft materials with high power factors (PFs) and low thermal conductivity (kappa) are critically important for integration of thermoelectric (TE) modules into flexible form factors for energy harvesting or cooling applications. Here, air stable p- and n-type multiwalled carbon nanotube films with high PFs (up to 521 mu W/m K-2) are reported, with n-type doping carried out in a facile two-step process. The maximum figures of merit (ZTs) of p-type and n-type CNTs are obtained as 0.019 and 0.015 at 300 K, respectively, with all three transport properties-Seebeck coefficient, electrical conductivity, and kappa-measured in-plane, providing a more accurate ZT. Using time-domain thermoreflectance, we report a fast and non-contact measurement of. without complex microfabrication or material processing. Moreover, there is no material mismatch between the p- and n-type legs of the TE module. Such materials have the potential for widespread applications in inexpensive and scalable wearable energy harvesting and localized heating/cooling.